CN1492468A - Semi flat cathode ray tube screen disc - Google Patents
Semi flat cathode ray tube screen disc Download PDFInfo
- Publication number
- CN1492468A CN1492468A CNA031556906A CN03155690A CN1492468A CN 1492468 A CN1492468 A CN 1492468A CN A031556906 A CNA031556906 A CN A031556906A CN 03155690 A CN03155690 A CN 03155690A CN 1492468 A CN1492468 A CN 1492468A
- Authority
- CN
- China
- Prior art keywords
- semi
- flat
- ryi
- curvature
- screen dish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/861—Vessels or containers characterised by the form or the structure thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/86—Vessels and containers
- H01J2229/8613—Faceplates
- H01J2229/8616—Faceplates characterised by shape
- H01J2229/862—Parameterised shape, e.g. expression, relationship or equation
Abstract
Semi-flat CRT panel having relations of Ryi<Rdi<Rxi and 2xRyi<Rxi, where Rxi denotes an inside surface horizontal curvature, Ryi denotes an inside surface vertical curvature, Rdi denotes an inside surface diagonal curvature for a CRT with an aspect ratio of 4:3 and an outside surface diagonal curvature Rd is greater than 30,000 mm, whereby securing a strength of the semi-flat CRT panel, eliminating a distortion of image, and reducing reflection from an external light.
Description
The present invention is dividing an application of the application that is entitled as " the CRT screen dish of semi-flat " submitted on August 17th, 1999, and the application number of original application is " 99119103.X ".
Technical field
The present invention relates to CRT (cathode ray tube) screen dish, the CRT screen dish that particularly has curved inner surface and flat outer surface.
Background technology
Fig. 1 represents to have the end view that the part of CRT of the prior art of curved inner surface and outer surface is cut out.
Referring to Fig. 1, the CRT of prior art is provided with: the screen dish 1 that forms front surface, be welded to screen and coil glass awl 2 on 1 rear surface, be positioned at glass and bore the neck 3 of 2 ends, be arranged on neck 3 inside, be used for the electron gun 5 of divergent bundle 4, be coated in screen and coil the red, green and blue fluorescent materials powder film (fluoroscopic active surface) 6 of 1 inner surface, be fixed between fluorescent powder membrane 6 and the electron gun 5, be used to select the shadow mask 7 that electron beam passes through and be installed in the neck neighboring, be used to make the deflecting coil 8 of the electron beam deflecting.When applying electric current for electron gun 5 and deflecting coil 8, from electron gun 5 divergent bundles 4, and deflecting coil 8 formation magnetic deflection fields, thereby make electron beam selectively by shadow mask 7, bump fluorescent powder membrane 6 and reproduced image.The beholder can see the image that reappears on the screen dish 1.
Fig. 2 represents to have the profile of screen dish assembly of prior art of color CRT of the screen dish of curved inner surface and outer surface.For keeping the high vacuum of CRT inside, the pass of the inner surface of the screen dish 1 of prior art and the curvature of outer surface is Ri＞Ro, and wherein Ri represents incurvature, and Ro represents extrinsic curvature.
But the incurvature of screen dish 1 and extrinsic curvature can cause image fault, and this depends on the direction of user's viewing screen dish, and can coil the reflection of 1 outer surface at screen from the exterior light of light source 9.Fig. 3 A and 3B are illustrated in the distortion of image when the front of screen dish and side are watched, and the curvature of Fig. 4 indication panel dish 1 outer surface reflects the light that incides screen with all angles and coil on 1 outer surface as convex mirror.These image faults and outside reflection of light can make the beholder feel eye fatigue.
Summary of the invention
Thereby the present invention relates to the CRT screen dish of semi-flat, it has been avoided basically because the restriction of prior art and several problems that shortcoming is brought.
The purpose of this invention is to provide the CRT screen dish that the outside reflection of light that can prevent to incide on the screen dish and image fault keep the semi-flat of same screen dish intensity simultaneously.
Description by the back makes other characteristics of the present invention and advantage part more obvious, perhaps can acquire by enforcement of the present invention.Purpose of the present invention and other advantage will realize by the structure that part in text description and claims and the accompanying drawing is pointed out and reach.
For realizing these and other advantage and according to purpose of the present invention, explanation as summary and summary, the CRT screen dish of described semi-flat has such relation: Ryi＜Rdi＜Rxi and 2 * Ryi＜Rxi, wherein Rxi represents the inner surface horizontal curvature, Ryi represents the vertical curvature of inner surface, Rdi represent for depth-width ratio be 4: 3 and outer surface diagonal curvature Rd greater than 30, the inner surface diagonal curvature of the CRT of 000mm; Preferably, the CRT screen dish of this semi-flat has the condition that is established as Ryi/Ye＞7, wherein the vertical length of the active surface of the CRT screen dish of " Ye " expression 1/2 semi-flat; Preferably, the CRT screen dish of this semi-flat has the Ryi of being established as * T
-2.74Condition, wherein, " T " is illustrated in the thickness at middle part of the CRT screen dish of semi-flat; Preferably, the CRT screen dish of this semi-flat has the Ryi/Ye of being established as＞7 and Ryi * T
-2.74Condition, wherein, the vertical length of active surface of the CRT screen dish of " Ye " expression 1/2 semi-flat, " T " are illustrated in the thickness at middle part of the CRT screen dish of semi-flat.
Should be appreciated that the detailed description of general description in front and back all is schematically and indicative and be tending towards providing of the present invention further explanation to claimed.
Description of drawings
Be included in the accompanying drawing that is used in the specification further understanding the present invention and constituting the part of this specification and represent embodiments of the invention, and be used from explanation principle of the present invention with text description one.
In the accompanying drawing:
Fig. 1 represents to have the end view that the part of CRT of the prior art of crooked inner surface and outer surface is cut out;
Fig. 2 represents to have the profile of screen dish assembly of prior art of color CRT of the screen dish of crooked inner surface and outer surface;
Fig. 3 A and 3B are illustrated respectively in the distortion of image when screen dish front and side are watched;
Fig. 4 represents the example of exterior light in the color CRT reflection of the prior art with crooked inner surface and outer surface;
Fig. 5 represents the front view according to the CRT screen dish of the semi-flat of most preferred embodiment of the present invention;
The cross section and the longitudinal section of the color CRT screen of semi-flat shown in Fig. 6 A and the 6B presentation graphs 5;
Fig. 7 represents the example of the image levitation effect (floatation effect) that the refraction by the CRT screen dish of semi-flat of the present invention causes;
Fig. 8 is that expression is for the present invention 29 " Ryi/Ye of the CRT screen dish of semi-flat and the relation curve of R; wherein Ryi represents the vertical direction curvature of screen inner surface; Ye represents half of vertical length of phosphor screen active surface, and R represents the floating curvature of vertical direction image that the beholder feels; With
Fig. 9 is illustrated in of the present invention 29 " Ryi * T in the color CRT screen of semi-flat
-2.74With relation curve from the stress of air.
Embodiment
Introduce the present invention in detail below with reference to most preferred embodiment of the present invention, example wherein of the present invention is shown among the accompanying drawing.Fig. 5 represents the front view according to the color CRT screen of most preferred embodiment semi-flat of the present invention, and Fig. 6 A and 6B be the cross section and the longitudinal section of the color CRT screen of semi-flat shown in the presentation graphs 5 respectively.Parts same as the prior art are represented with identical label, and have been omitted its detailed description.
The present invention suggestion be provided for guaranteeing semi-flat CRT screen dish intensity and prevent image fault semi-flat CRT screen dish interior surface curvature and the outer surface diagonal curvature of the CRT screen dish 11 of the semi-flat of full flat surfaces basically of the CRT screen dish of semi-flat is provided.
Introduce one embodiment of the present of invention below with reference to Fig. 5,6A and 6B.
If the inner surface horizontal curvature is Rxi, the vertical curvature of inner surface is Ryi, inner surface diagonal curvature is that 4: 3 and outer surface diagonal curvature Rd are greater than 30 for having depth-width ratio, the screen dish 11 of the semi-flat of the CRT of 000mm is Rdi, then has such relation: Ryi＜Rdi＜Rxi and 2 * Ryi＜Rxi.The CRT screen dish 11 of aforementioned semi-flat has reduced the fatigue of beholder's eyes, this be because, it is with just always the CRT screen dish of the prior art of generation reflection is different in case exterior light is arranged, because the outer surface of the CRT screen dish 11 of semi-flat of the present invention is smooth basically, on the position of beholder, can occur in the reflection of CRT screen Pan Chu with respect to light source.
And, though the inner surface of the CRT screen dish 11 of semi-flat has curvature, the image that reappears on fluorescent powder membrane 6 is refracted, and image is that first medium advances to i.e. second medium of air by the CRT screen dish 11 of semi-flat, give a kind of illusion of beholder, promptly image is floating.Fig. 7 represents the example of the image levitation effect that the refraction by the color CRT screen of semi-flat of the present invention causes.As shown in Figure 7, because the color CRT screen 11 and the refraction coefficient difference between the air of semi-flat make the vertical curvature Ryi of the color CRT screen of semi-flat seem for the beholder to seem that Ryi has the floating vertical curvature R of the image shown in the dotted line, it provides a kind of like this effect, and promptly the beholder feels that image is more smooth.Though in the inner surface diagonal curvature Rdi of the color CRT screen 11 of semi-flat and inner surface horizontal curvature Rdx, produce the image levitation effect, when the flatness of CRT feels that when having that the Ryi of short curvature determines, Ryi should be as the criterion that designs.
Fig. 8 represents for the present invention 29 " Ryi/Ye of the color CRT screen of semi-flat and the curve of R; wherein Ryi represents the vertical direction curvature of screen inner surface; Ye represents half of vertical length of phosphor screen active surface, and R represents the floating curvature of vertical direction image that the beholder feels." experiment of the CRT screen dish 11 of semi-flat has proved that the Ryi/Ye ratio greater than 7 provides excellent flatness sensation according to utilizing 29.Thereby when Ye=200mm, Ryi will be greater than 1400mm.On the other hand, even the flatness of the color CRT screen 11 of semi-flat sensation also can be better when the vertical curvature Ryi of inner surface is bigger, if the vertical curvature Ryi of inner surface of the CRT screen dish 11 of semi-flat is too big, then structurally the CRT screen dish 11 of semi-flat is a danger close, because be that the vertical curvature of inner surface of the CRT screen dish 11 of semi-flat under the smooth situation is screen dish intensity based at the outer surface of the CRT of semi-flat screen dish 11.Therefore, the definite sexy feel of intensity and plane that should consider the CRT screen dish 11 of semi-flat of the vertical curvature Ryi of inner surface of the CRT screen dish 11 of semi-flat.
Fig. 9 represents of the present invention 29 " Ryi * T in the color CRT screen of semi-flat
-2.74With relation from the stress of air.Stress is more little, and the structure of the CRT screen dish 11 of semi-flat is safe more.The maximum stress that the CRT screen dish of semi-flat can keep is 80kgf/cm
2Though the intensity of the CRT screen dish 11 of semi-flat is coiled the thickness T thickening at 11 middle parts along with the CRT screen of semi-flat and strengthened, thickness T should suitably be determined according to different qualities, because too big T can increase the overall weight and the disadvantageous manufacturing process of color CRT.Ryi * T
-2.74Be to have the two factor Ryi of appreciable impact and the regression analysis (regression analysis) of the relation between the T to calculate by structural strength to color CRT.If Ryi * T
-2.74Greater than 1.70, then stress surpasses 80kgf/cm
2, the CRT screen dish 11 of promptly more weak semi-flat.Therefore, 29 " under the situation of the CRT screen dish 11 of semi-flat, if when T=15.0mm Ryi=2920mm, then can guarantee the security intensity of the CRT screen dish 11 of semi-flat.
Like this, the CRT screen dish 11 of semi-flat of the present invention can reduce outside reflection of light by the flat outer surface basically of the CRT screen dish of formation semi-flat, and by the structural strength that can guarantee the screen dish 11 of semi-flat for the curvature of the inner surface of the CRT screen dish 11 of the semi-flat with Ryi＜Rdi＜Rxi and 2 * Ryi＜Rxi relation is provided, also by providing the image levitation effect can prevent image fault.
It will be apparent to those skilled in the art that under the situation that does not break away from the spirit or scope of the present invention and can make various modifications and change the CRT screen dish of semi-flat of the present invention.Therefore, the present invention is tending towards covering of the present invention various modifications and change and the equivalents thereof that is included in claims scope.
Claims (2)
1. the CRT screen dish of a semi-flat comprises:
Basically flat outer surface;
Spherical inside surface, for depth-width ratio 4: 3 CRT, it has following relation: Ryi＜Rdi＜Rxi, 2Ryi＜Rxi, and Ryi/Ye＞7, wherein Rxi represents the inner surface horizontal curvature, Ryi represents the vertical curvature of inner surface, Rdi represents inner surface diagonal curvature, and Ye represents 1/2 vertical length of active surface; And
Rd is greater than 30 for outer surface diagonal curvature, 000mm.
2. the CRT screen dish of semi-flat as claimed in claim 1 comprises:
Be established as Ryi * T
2.74＜1.7 condition, wherein ' T ' is illustrated in the thickness at middle part of the CRT screen dish of semi-flat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR33306/1998 | 1998-08-17 | ||
| KR1019980033306A KR100267963B1 (en) | 1998-08-17 | 1998-08-17 | Cathode ray panel |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB99119103XA Division CN1139965C (en) | 1998-08-17 | 1999-08-17 | Semi-flat cathode-ray tube blanking disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1492468A true CN1492468A (en) | 2004-04-28 |
Family
ID=19547441
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB99119103XA Expired - Fee Related CN1139965C (en) | 1998-08-17 | 1999-08-17 | Semi-flat cathode-ray tube blanking disk |
| CNA031556906A Pending CN1492468A (en) | 1998-08-17 | 1999-08-17 | Semi flat cathode ray tube screen disc |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB99119103XA Expired - Fee Related CN1139965C (en) | 1998-08-17 | 1999-08-17 | Semi-flat cathode-ray tube blanking disk |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6388373B1 (en) |
| JP (1) | JP2000113841A (en) |
| KR (1) | KR100267963B1 (en) |
| CN (2) | CN1139965C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100300319B1 (en) * | 1998-11-13 | 2001-10-29 | 김순택 | Cathode ray tube |
| KR100331820B1 (en) * | 2000-04-12 | 2002-04-09 | 구자홍 | Flat Cathode Ray Tube |
| KR100364695B1 (en) * | 2000-05-04 | 2003-02-06 | 엘지전자 주식회사 | Anti-Explosion type Panel of Braun tube |
| US6515410B2 (en) * | 2000-05-19 | 2003-02-04 | Hitachi Ltd. | Color cathode ray tube |
| US6597097B2 (en) * | 2000-09-26 | 2003-07-22 | Lg Electronics Inc. | Cathode ray tube having panel with improved tensile stress |
| KR100389541B1 (en) * | 2001-02-14 | 2003-06-27 | 주식회사 엘지이아이 | A Flat Type CRT |
| KR100404575B1 (en) * | 2001-02-14 | 2003-11-12 | 엘지전자 주식회사 | A Flat Type CRT |
| KR100798449B1 (en) * | 2001-06-30 | 2008-01-30 | 삼성코닝 주식회사 | Flat type cathode ray tube panel |
| KR100439268B1 (en) * | 2001-12-19 | 2004-07-07 | 엘지.필립스디스플레이(주) | Flat Type Color Cathode Ray Tube |
| KR100408005B1 (en) * | 2002-01-03 | 2003-12-03 | 엘지.필립스디스플레이(주) | Panel for CRT of mask stretching type |
| KR100460779B1 (en) * | 2002-03-05 | 2004-12-09 | 엘지.필립스디스플레이(주) | Flat-type CRT |
| US7012356B2 (en) * | 2002-07-15 | 2006-03-14 | Lg. Philips Displays Korea Co., Ltd. | Color cathode ray tube |
| KR100489604B1 (en) * | 2002-09-13 | 2005-05-17 | 엘지.필립스 디스플레이 주식회사 | Flat Type Color Cathode Ray Tube |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535907B1 (en) * | 1983-03-09 | 1998-03-10 | Shibaura Denki Kk | Cathode-ray tube |
| JPH0644457B2 (en) * | 1986-01-30 | 1994-06-08 | 松下電子工業株式会社 | Color picture tube |
| GB2187036A (en) * | 1986-02-21 | 1987-08-26 | Philips Electronic Associated | Cathode ray tube |
| JP2845908B2 (en) | 1988-11-30 | 1999-01-13 | 株式会社日立製作所 | Shadow mask type color cathode ray tube |
| JPH0614454B2 (en) * | 1990-03-22 | 1994-02-23 | 松下電子工業株式会社 | Shadow mask type color picture tube |
| JP3427440B2 (en) * | 1993-09-29 | 2003-07-14 | ソニー株式会社 | Cathode ray tube for projector |
| JP3354297B2 (en) * | 1994-08-09 | 2002-12-09 | 株式会社東芝 | Color picture tube |
| KR100313829B1 (en) * | 1996-03-06 | 2001-12-28 | 니시무로 타이죠 | Cathode ray tube and its manufacturing method |
| US6160344A (en) * | 1997-04-12 | 2000-12-12 | Samsung Display Devices Co., Ltd. | Cathode-ray tube |
| TW393661B (en) * | 1997-09-02 | 2000-06-11 | Mitsubishi Electric Corp | Color picture tube device with stretched shadow grille |
| KR100300319B1 (en) * | 1998-11-13 | 2001-10-29 | 김순택 | Cathode ray tube |
-
1998
- 1998-08-17 KR KR1019980033306A patent/KR100267963B1/en not_active IP Right Cessation
-
1999
- 1999-08-17 JP JP11265935A patent/JP2000113841A/en active Pending
- 1999-08-17 CN CNB99119103XA patent/CN1139965C/en not_active Expired - Fee Related
- 1999-08-17 US US09/375,367 patent/US6388373B1/en not_active Expired - Fee Related
- 1999-08-17 CN CNA031556906A patent/CN1492468A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000014095A (en) | 2000-03-06 |
| CN1248057A (en) | 2000-03-22 |
| KR100267963B1 (en) | 2000-10-16 |
| US6388373B1 (en) | 2002-05-14 |
| JP2000113841A (en) | 2000-04-21 |
| CN1139965C (en) | 2004-02-25 |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |